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From "He Yongqiang (JIRA)" <>
Subject [jira] [Commented] (HIVE-1803) Implement bitmap indexing in Hive
Date Wed, 23 Mar 2011 21:46:06 GMT


He Yongqiang commented on HIVE-1803:

I did not do a detailed look, overall the patch looks good. It follows the steps of existing
compact index. 

But can you do some tests on the javaewah stuff to see its performance? And what features
in javawah are used by this jira?  For compression, if we can just compress the bitmap using
simple RLE, how much differences are there? What i mean, also not sure about, is javawah may
have a lot features that we do not need, but that add some overhead to the code.

> Implement bitmap indexing in Hive
> ---------------------------------
>                 Key: HIVE-1803
>                 URL:
>             Project: Hive
>          Issue Type: New Feature
>          Components: Indexing
>            Reporter: Marquis Wang
>            Assignee: Marquis Wang
>         Attachments: HIVE-1803.1.patch, HIVE-1803.2.patch, HIVE-1803.3.patch, HIVE-1803.4.patch,
HIVE-1803.5.patch, HIVE-1803.6.patch, HIVE-1803.7.patch,, bitmap_index_1.png,
bitmap_index_2.png, javaewah.jar, javaewah.jar
> Implement bitmap index handler to complement compact indexing.

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